Switch. TPS22951 Datasheet

TPS22951 Datasheet PDF


Part

TPS22951

Description

Current-Limited Smart-Load Switch

Manufacture

etcTI

Page 23 Pages
Datasheet
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TPS22951 Datasheet
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TPS22951
SLVS788D – FEBRUARY 2009 – REVISED NOVEMBER 2016
TPS22951 Current-Limited 1-Smart-Load Switch
1 Features
1 1-P-Channel MOSFET
• 300-mA Continuous Source Current
• Thermal and Short-Circuit Protection
• 600-mA Current Limit
• Operating Range: VCC = 2.8 V to 5.3 V
• 41-μs Typical Rise Time
• 10-μA Maximum Standby Supply Current
• Ambient Temperature Range: –40°C to +85°C
• ESD Performance Tested Per JESD 22
– 4000-V Human-Body Model (HBM)
– 400-V Machine Model (MM)
– 1000-V Charged-Device Model (CDM)
2 Applications
• Smart Phones
• Notebooks
• Digital Cameras
• Peripheral Ports
3 Description
The TPS22951 smart-load switch is intended for
applications where heavy capacitive loads and short
circuits are likely to be encountered. This device
incorporates a 1-P-channel MOSFET power switch
for power distribution. The switch is controlled by a
logic enable (EN) input and an accessory detect
(DET) pin. The switch is active when EN is high and
DET is low. The switch is disabled if EN is low or
DET is high. A low power state is achieved by driving
EN low.
When the output load exceeds the current-limit
threshold or a short is present, the device limits the
output current to a safe level by increasing the on
resistance of the power switch. When continuous
heavy overloads and short circuits increase the power
dissipation in the switch, causing the junction
temperature to rise, a thermal-protection circuit shuts
off the switch to prevent damage. The device
recovers from a thermal shutdown once the device
has cooled sufficiently, but the switch remains OFF
until EN is toggled. This smart-load switch is
designed to set current limit at 600 mA maximum.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPS22951
DSBGA (6)
1.20 mm x 0.80 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
Power
Supply
VCC PWR
CIN
CLOAD
RLOAD
GND
VDD
ON
EN
OFF
PG DET Accessory Detection
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS22951 Datasheet
TPS22951
SLVS788D – FEBRUARY 2009 – REVISED NOVEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configurations and Functions ....................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Timing Requirements ................................................ 5
6.7 Switching Characteristics .......................................... 5
6.8 Typical Characteristics .............................................. 6
7 Parameter Measurement Information .................. 8
8 Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................. 10
8.4 Device Functional Modes........................................ 10
9 Application and Implementation ........................ 11
9.1 Application Information............................................ 11
9.2 Typical Application ................................................. 11
10 Power Supply Recommendations ..................... 12
11 Layout................................................................... 13
11.1 Layout Guidelines ................................................. 13
11.2 Layout Example .................................................... 13
11.3 Thermal Considerations ........................................ 13
12 Device and Documentation Support ................. 15
12.1 Documentation Support ........................................ 15
12.2 Receiving Notification of Documentation Updates 15
12.3 Community Resources.......................................... 15
12.4 Trademarks ........................................................... 15
12.5 Electrostatic Discharge Caution ............................ 15
12.6 Glossary ................................................................ 15
13 Mechanical, Packaging, and Orderable
Information ........................................................... 15
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision C (March 2015) to Revision D
Page
• Changed all instances of "POK" to "PG" in the data sheet .................................................................................................... 1
Changes from Revision B (November 2012) to Revision C
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section ............................... 1
Changes from Revision A (March 2009) to Revision B
Page
• Updated Top-Side Marking in the Ordering Information table................................................................................................ 3
2 Submit Documentation Feedback
Product Folder Links: TPS22951
Copyright © 2009–2016, Texas Instruments Incorporated


Features Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS22951 SLVS788D – FEBRUA RY 2009 – REVISED NOVEMBER 2016 TPS22 951 Current-Limited 1-Ω Smart-Load Sw itch 1 Features •1 1-Ω P-Channel M OSFET • 300-mA Continuous Source Curr ent • Thermal and Short-Circuit Prote ction • 600-mA Current Limit • Oper ating Range: VCC = 2.8 V to 5.3 V • 4 1-μs Typical Rise Time • 10-μA Maxi mum Standby Supply Current • Ambient Temperature Range: –40°C to +85°C ESD Performance Tested Per JESD 22 4000-V Human-Body Model (HBM) – 40 0-V Machine Model (MM) – 1000-V Charg ed-Device Model (CDM) 2 Applications Smart Phones • Notebooks • Digita l Cameras • Peripheral Ports 3 Descr iption The TPS22951 smart-load switch i s intended for applications where heavy capacitive loads and short circuits ar e likely to be encountered. This device incorporates a 1-Ω P-channel MOSFET power switch for power distribution. The switch is controlled by a logic enable (EN) input and an accessory det.
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